Need ideas on a theme

Hi,

As a follow up to Gillian is born, I am exploring a concept of a mid-twenties crossdressing male who has the fantasy to be a woman who is heavily pregnant, and who discovers a partner who can make this happen in a prosthetic manner to his becoming her delight. Would this be too much? would anyone be interested in reading such a tale?
This involves
1. Meeting up
2. Discussion of the future
3. Entering an into a Bi-sexual relationship initially
4. Hormones
5. Surgery and enhancement's to that
6. Life after

I have a bare bones version that needs working up but don't want to go too far incase it is offensive.